CombinationHash

The hash that retuns same value for a combination of arrayed parameters associated as a key

ch = CombinationHash.new
ch[2,3,4] = 8
p ch[2,3,4] #=> 8
p ch[3,2,4] #=> 8
p ch[4,2,3] #=> 8

ch = CombinationHash([3,4,5] => 6
                     [2,1] => 10)
					 
p ch[1,2] #=> 10

Gemfile

gem 'combination_hash'

bundle install

or just $ gem install combination_hash

Copyright (c) 2012 Masaki Sawamura. See LICENSE.txt for further details.